Internal-combustion engine.



H. L. BROWNBACK. INTERNAL GOMBUSTION ENGINE. APPLICATION FILED APR.6, 1912.

Patented N0v.4,1913.

2 SHEETS-SHEET l.

Gftoamsu H..L. BROWNBAUK. INTERNAL COMBUSTION ENGINE.

APPLICATION FILED APB. 6, 1912 Patented Nov. 4, 1913.

Lof/7393.

2 SHEETS-SHEET 2l @Houma i cated at the top of the cylinder.

HENRY LOWE BROWNBNACK, 0F NOBRISTOWN, PENNSYLVANIA. I

INTERNAL-COMBUSTION ENGINE.

Specification of Letters Patent.

Patented Nev. 4,1913.

Application tiled April 6, 1912. Serial No. 688,950.

ATo all whom it may concern:

Be it known that I, HENRY L. BROWN- BACK, a citizen of the United States, residing at Norristown, in the county of Montgomery and State of Pennsylvania, have invented new and useful Improvements in internal-Combustion Engines, of which the following is a specification.

This invention provides a novel valve mechanism whereby the efficiency of engines of this type is enhanced and the same rendered .practically noiseless in operation so far as any clatter of valve operating means is concerned, the invention also avoiding the necessity for grinding of valves or the frequent replacement thereof.

The invention aims further to utilize the gaseous mixture as means for cooling the valve, said gaseous mixture being further heated prionto its entrance into the cylinder, thereby insuring a thorough vaporization of every particle of the liquid fuel.

The invention consists of the novel :features, details'of construction and combination of arts, which hereinafter will be more particu arly set forth, illustrated in the accompanying drawings, and pointed out in the appended claims.

Referring to the drawings, forming a part of the specification, Figure l isa sectional view of an internal combustion engine of the four cycle type provided with avalle having a horizontal arrangement and Fig. 2 is a View similar to Fig. 1, showing the valve vertically arranged, at the upper end and at one side of the cylinder. Fig. 3 is an enlarged sectional view of the valve.

Corresponding and like parts are referred to in the following description, and indicated in all the views of 'the drawings, by the same reference characters.

Referring to Fig. 1 of the drawings the cylinder of the engine is indicated at 1. The valve chamber 2 is located horizontally at the upper end of the cylinder and is provided a't opposite ends withports 3 and 4 and intermediate of its ends with a port 5 which opens into the cylinder 1. The port l is the intake and may be connected with any source of supply of gaseous mixture and the port 3 provides an exhaust for the burnt gases when the piston is on the scavenging stroke.y The valve chamber 2 is cylindrical in form and may be provided in any manner, either as a part of the cylinder, which is the preferable construction, or independently thereof and secured thereto in any way. Jacket surrounds the valve chamber and upper portion of the cylinder and is adapted to have a cooling medium circulated therethro-ugh.

.The valve 6 is hollow and cylindrical in form and'one end thereof is imperforate, whereas the opposite end is open and has a plurality of arms 7 which are united by means of a boss 8 in which is fitted a rod 9 by means of which the valve is operated. An opening 10 is formed in a side of the valve near the open end lthereof and is adapted to register with the port 5 of the' cylinder. Packing rings are fitted in the annular grooves formed in an end portion of the valve. On the suction stroke of the piston the valve 6 occupies a position in the valve chamber with .its opening 10 in register with the port 5 so that the gaseous mixture may be drawn into the cylinder through the valve without any appreciable hindrance. 0n the compression and working strokes of the piston thevalve occupies a position with the packing rings thereof on opposite sides of the port 5 so as to maintain compression and prevent any loss thereof.' When the piston is on the scavenging stroke the valve occupies a position wholly to one side of the port 5 and between said port and the port 4, thereby admitting of the burnt gases having an unobstructed passage through the end portion of the valve chamber adjacent that provided with the outlet 3. Any means may be employed for operating the valve 6 and as shown a rocker 11 is pivoted at 12 and has its upper end connected to the rod 9 and its lower end connected to a rod 12 which is arranged to l operate in a bushing or guide 13 arranged in a side of the crank case 'or frame of the engine. A roller 14 at the inner end of the rod 12 is adapted to coperate with a cam 15 of the cam shaft 16, which is adapted 'to derive motion from the crank shaft 17 in any convenient way.

In the construction illustrated in Fig. 2 the cylinder 1 has the valvechamber 2*'- at one side thereof in vertical position, said valve chamber having the inlet 4* and the outlet 3a at op osite ends and the port 5a intermediate of) its ends. The valve 6 is substantially the same in `construct-ion as hereinbefore set forth and is arranged to operate in the valve chamber 2. The rod 9a connected to.the valve operates through l the lower end of the valve chamber and is connected With one member of a bell crank 18, the opposite member of the bell crank being arranged to coperat'e With a cam 19 on the cam shaft 20, which latter is adapted to be operated from the crank shaft 17. The operation of the valve is precisely the same as that described in connection With the operation of the valve .shown in Fig. l. A

The piston is indicated at 21 in both Fig. l and Fig. 2 and is connected by means of a rod 22 with the crank shaft 17. The operating parts, such as the crank shaft, the cam shaft, connecting rod 22 and valve operating means are arranged Within the crank case 23 andare adapted to be lubricated by a splash action of the crank portions of the crank shaft sweeping through the oil contained in the lower portion of the crank case.

From the foregoing description, taken in connection with the accompanying drawo ings,.the advantages of the construction and cylinder having a valve chamber provided at an -intermediate point with a port opening into the cylinder and at opposite ends With an intake and an exhaust, a piston valve slidably mounted in the valve chamber and having an opening in a side and an opening in the end facing the end of the valve chamber provided with the intake, Said valve having spaced packing rings upon an end portion to come upon opposite sides of the port leading into the cylinder when the valve occupies a position to close said port both upon the compression and the Working strokes of the piston, and operating means for the said valve.

2. In an internal combustion engine, a cylinder having a valve chamber provided at opposite ends With an intake and an eX- haust and at an intermediate point with a portopening into the cylinder, a hollow piston valve arranged to operate in the valvel chamber and having an opening in a side andan opening in the end facing the intake and having its opposite end imperforate, said valve having the end portion adjacent the exhaust provided with spaced packing rings to come upon opposite sides of the portleading into the cylinder when the valve occupies a position to close said port on the compression and Working strokes of the piston, and operating means for the said valve.

In testimony whereof I afIiX my signature in presence of two Witnesses.

HENRY LOWE BROl/VNBACK. Witnesses:

KATHARINE R. K/IERNAN, J. B. LARZAND, Jr. 

